Yeah, I`m pretty sure I know chrome when I see it. My M window trim is chrome, or should I say dirty and corroded chrome. What types of polish should I use? Or is it cheaper to just to get new trim. It is for the rear side push out windows. The trim around the door windows is in perfect condition, which doesnt make sense. Arent they all made out of alumninum. I`m not one to complain because its still in good shape, but I figure if I am going to replace it, I`ll replace it all.